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垂直电场下BaTiO3单晶的畴变与压痕裂纹的演化赵显武1,褚武扬2,乔利杰2(1.北京市北京大学力学与空天技术系2.北京科技大学 腐蚀与防护中心)摘 要:利用微分干涉相衬显微镜,在垂直于极化方向的电场下,对BaTiO3单晶的畴变过程和单晶上压痕裂纹的变化过程进行了原位观察.通过对压痕周围和远离压痕区畴变过程的对比,研究了压痕对其周围畴变的影响.结果显示,面内极化试样在垂直于极化方向的面内电场作用下,原有压痕和压痕裂纹随整个试样经历90°畴变后也要发生变化,变化后其形貌与在新的极化状态下重新压制的压痕相似;对离面......
analyzed from two aspects of displacement evolution and frequency domain analysis. Different travel determination methods were compared in a biaxial compression test to determine the most precise..., and increases gradually with the increase of inter-particle contact spring stiffness and confining pressure. Key words: rockfill; shear wave velocity; frequency domain analysis; cross-relation method 岩土颗粒......
In-situ observation on domain switching of PLZT via Raman spectroscopy ZHANG Sa(张 飒)1, CHENG Xuan(程 璇)2, 3, ZHANG Ying(张 颖)2 1. College of Chemistry and Chemical Engineering, Xiamen... of domain switching in PLZT ceramics via observation of Raman spectrum changes based on the Raman light scattering principle and the soft mode theory. A Vickers indent was introduced into the polarized......
J. Cent. South Univ. (2018) 25: 1799-1812 DOI: https://doi.org/10.1007/s11771-018-3870-0 Structure design and characteristics analysis of a cylindrical giant magnetostrictive actuator for ball... a new approach for automatic adjustment of double-nut ball screw preload. Key words: ball screw preload; cylindrical giant magnetostrictive actuator (CGMA); structure design; output characteristics......
, a computational model considering pile-soil-structure interaction effect was established by finite element method. Then, numerical implementation was made in time domain. At the same time, a simplified...- structure interaction effect was established by the finite element method. Then, numerical implementation was made in time domain. At the same time, a simplified method for seismic response analysis......
格构梁与锚索注浆复合结构在加固边坡工程中的应用研究 徐小华1 (1.中国地质大学<武汉>计算机学院,湖北,武汉,430074;2.湖南省隧道工程总公司,湖南,益阳,413000) 摘要:格构梁与锚杆(索)复合结构是治理滑坡的一种有效措施.系统阐述了格构梁与锚杆(索)复合结构的作用机理,格构梁简化为受多个集中力作用的弹性地基梁进行计算的原理与步骤,锚管注浆加固裂隙岩体的设计实施过程,并将其应用于具体实例的边坡治理中,取得了满意的结果,可为同类工程提供参考. 关键词:格构梁; 锚索; 注浆; Winkler弹性地基梁; 滑坡治理; [全文内容正在添加中] ......
different materials surfaces with one-dimensional microscale random roughness were obtained with the finite difference time domain method (FDTD) and near-to-far-field transformation. The surface...; finite difference time domain method  ......
Trans. Nonferrous Met. Soc. China 29(2019) 1067-1081 Macroscopic and microscopic trans-scale characteristics of pore structure of mine grouting materials Jian-hua HU1, Qi-fan REN1, Shao-wei MA1, Quan..., School of Civil and Environmental Engineering, Nanyang Technological University, Singapore Received 21 June 2018; accepted 29 December 2018 Abstract: The pore structure and porosity of three kinds......
experiments. Secondly, the supporting system of the stope was studied and 9 stope structure parameters were proposed based upon orthogonal design, with B (pillar width) and W (room width) as the two... structure parameter was obtained with considerations of security. The results show that the effects are fairly good using the proposed parameters of grouting and stope structure. During the ore drawing......
J. Cent. South Univ. (2016) 23: 10-17 DOI: 10.1007/s11771-016-3043-y Analysis of 13Cr bloom solidification structure using CA-FE model ZHAI Ying-ying(翟莹莹)1, MA Bei-yue(马北越)1, LI Ying(厉英)1, JIANG... 2522, Australia Central South University Press and Springer-Verlag Berlin Heidelberg 2016 Abstract: Solidification structure is critical in the control of the mechanical properties and quality during......